:root{color-scheme:light;--bg:#f8f8fa;--card:#ffffff;--ink:#18193f;--muted:#6a707c;--border:rgba(24,25,63,0.12)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink)}main{max-width:720px;margin:0 auto;padding:2rem 1rem}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1rem;margin-top:1rem}label{display:block;font-size:.875rem;font-weight:600;margin-bottom:.25rem}input{width:100%;padding:.75rem;border:1px solid var(--border);margin-bottom:.75rem}button,input{border-radius:8px}button{padding:.6rem 1rem;border:1px solid var(--border);background:#fff;cursor:pointer;margin-right:.5rem}button.primary{background:#11c44c;border-color:#11c44c;color:#fff}.error{color:#b00020;margin-top:1rem}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;white-space:pre-wrap}.muted{color:var(--muted)}